#NextGenATP Serbian Hamad Medjedovic moved past former World No. 3 Dominic Thiem 7-5, 2-6, 6-3 on Wednesday at the EFG Swiss Open Gstaad to reach his maiden tour-level quarter-final.
The 20-year-old was aggressive throughout the two-hour, 15-minute encounter, forcing Thiem into forehand errors with his weight and depth of shot at the ATP 250 clay-court event.
With his third tour-level win of the season, Medjedovic has climbed two spots to eighth in the Pepperstone ATP Live Next Gen Race. The Serbian, who is aiming to make his debut at the Next Gen ATP Finals, will next face fourth seed Yannick Hanfmann. The German defeated Daniel Altmaier 4-6, 6-2, 7-5.
Thiem has tasted success in Gstaad before, lifting the trophy in 2015. He leaves Switzerland holding an 8-16 record on the season, with his best result quarter-final runs in Estoril and Munich.
In earlier action Belgian qualifier Zizou Bergs clawed past Jurij Rodionov 7-6(8), 4-6, 7-6(4) in two hours and 56 minutes. The 24-year-old will next meet second-seeded Serbian Miomir Kecmanovic, who wrapped up Wednesday's play with a 7-6(4), 6-1 win against Dominick Stricker.
Kecmanovic, a top two seed at an ATP Tour event for the second time, is through to his 24th tour-level quarter-final and his sixth of 2023.